ratio, the product of two inner terms is the smallest composite number, one of the outer terms is 10, what is the other outer term
一个比例，两个内项的积是最小的合数，其中一个外项是10，另一个外项是多少
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>