It is known that the product of two factors is (8/9), one factor is 4, and the other factor is what.
已知两个因数的积是(8/9)，一个因数是4，另一个因数是多少．
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">(8/9) / 4</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>