It is known that the product of two factors is 12.648, one of which is 3.1, and what is the other factor.
已知两个因数的积是12.648，其中一个因数是3.1，另一个因数是多少．
<gadget id="calculator">12.648 / 3.1</gadget>
<output>4.08</output>

<result>4.08</result>