converting scientific number to Number - XSLT

To conver BigDecimal number in to the normal number in xslt ,we need to write  a new template .
then call this template in the following way
xsl:call-template name="convertSciToNumString"><xsl:with-param name="inputVal" select="percentAmmo" /></xsl:call-template>Template is
<xsl:template name="convertSciToNumString">

<xsl:param name="inputVal" select="0" />

<xsl:variable name="max-exp">

<xsl:value-of

select="'0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'" />

</xsl:variable>

<xsl:variable name="numInput">

<xsl:value-of select="translate(string($inputVal),'e','E')" />

</xsl:variable>

<!-- ==== Mantisa ==== -->

<xsl:variable name="numMantisa">

<xsl:value-of select="number(substring-before($numInput,'E'))" />

</xsl:variable>

<!-- ==== Exponent ==== -->

<xsl:variable name="numExponent">

<xsl:choose>

<xsl:when test="contains($numInput,'E+')">

<xsl:value-of select="substring-after($numInput,'E+')" />

</xsl:when>

<xsl:otherwise>

<xsl:value-of select="substring-after($numInput,'E')" />

</xsl:otherwise>

</xsl:choose>

</xsl:variable>

<!-- ==== Coefficient ==== -->

<xsl:variable name="numCoefficient">

<xsl:choose>

<xsl:when test="0 > $numExponent">

<xsl:text>0.</xsl:text>

<xsl:value-of select="substring($max-exp, 1, -number($numExponent)-1)" />

<xsl:text>1</xsl:text>

</xsl:when>

<xsl:when test="$numExponent > 0">

<xsl:text>1</xsl:text>

<xsl:value-of select="substring($max-exp, 1, number($numExponent))" />

</xsl:when>

<xsl:otherwise>

1

</xsl:otherwise>

</xsl:choose>

</xsl:variable>

<xsl:variable name="result">

<xsl:value-of select="number($numCoefficient) * number($numMantisa)" />

</xsl:variable>

<xsl:choose>

<xsl:when test="$result = 'NaN'">

<xsl:value-of select="$numInput" />

</xsl:when>

<xsl:otherwise>

<xsl:value-of select="$result" />

</xsl:otherwise>

</xsl:choose>
</xsl:template>

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