It is known that the product of two factors is (8/15), one of which is (8/9), and what is the other factor.
已知两个因数的积是(8/15)，其中一个因数是(8/9)，另一个因数是多少．
<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">(8/15) / (8/9)</gadget>
<output>3/5 = around 0.6</output>

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