The product of two factors is (2/9), one of which is (4/15), what is the other?
两个因数的积是(2/9)，其中一个因数是(4/15)，另一个因数是多少？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(2/9) / (4/15)</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>