The product of two factors is 1, one of which is (5/3) and what is the other.
两个因数的积是1，其中一个因数是(5/3)，另一个因数是多少．
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">1 / (5/3)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>