The two outer items are 24 and 20, and the two inner items are a number and the reciprocal of the smallest composite number. Find this number.
两个外项是24和20，两个内项分别是一个数和最小合数的倒数求这个数．
<gadget id="calculator">24 * 20</gadget>
<output>480</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">480 / (1/4)</gadget>
<output>1_920</output>

<result>1_920</result>