The product of two factors is (8/15), one of which is 4, what is the other factor?
两个因数的积是(8/15)，其中一个是4，另一个因数是多少？
<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">(8/15) / 4</gadget>
<output>2/15 = around 0.133333</output>

<result>2/15 = around 0.133333</result>