One multiplier is 13, the product is 5 times it, what is the other multiplier
一个乘数是13，积是它的5倍，另一个乘数是多少
<gadget id="calculator">13 * 5</gadget>
<output>65</output>

<gadget id="calculator">65 / 13</gadget>
<output>5</output>

<result>5</result>