It is known that the product of two factors is 1, one of which is (7/2), and what is the other factor.
已知两个因数的积1，其中一个因数是(7/2)，另一个因数是多少．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">1 / (7/2)</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>