It is known that the product of two factors is (8/25), and one of the factors is (2/5), what is the other factor.
已知两个因数的积是(8/25)，其中一个因数是(2/5)，则另一个因数是多少．
<gadget id="calculator">8 / 25</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(8/25) / (2/5)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>