A number multiplied by the reciprocal of (1/4), the product is 1, what is the number.
一个数乘(1/4)的倒数，积是1，这个数是多少．
<gadget id="calculator">4 / 1</gadget>
<output>4</output>

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

<result>1/4 = around 0.25</result>