The product of two multipliers is (10/21), one of which is (1/7), and what is the other multiplier.
两个乘数的积是(10/21)，其中一个乘数是(1/7)，另一个乘数是多少．
<gadget id="calculator">10 / 21</gadget>
<output>10/21 = around 0.47619</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(10/21) / (1/7)</gadget>
<output>10/3 = around 3.333333</output>

<result>10/3 = around 3.333333</result>