(4/7) of 49 is (1/2) of a number, what is this number?
49的(4/7)是一个数的(1/2)，这个数是多少？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/7) / (1/2)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">49 * (8/7)</gadget>
<output>56</output>

<result>56</result>