x, y, z are three integers, their average is 24, their ratio is 2:3:7, then z=how many.
x、y、z是三个整数，它们的平均数为24，它们的比是2：3：7，那么z=多少．
<gadget id="calculator">2 + 3 + 7</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">24 * 3 * (7/12)</gadget>
<output>42</output>

<result>42</result>