Number A is 56, Number B is (4/7) of Number A, and (1/2) of Number C. What is the number of C?
甲数是56，乙数是甲数的(4/7)，又是丙数的(1/2)，丙数是多少？
<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">56 * (8/7)</gadget>
<output>64</output>

<result>64</result>