9 hens lay 12 eggs in 4 days, how many eggs will the 4 hens lay in 9 days?
9只母鸡在4天内下12只蛋，问4只母鸡在9天内下多少只蛋．
<gadget id="calculator">12 / 9 / 4</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 4 * 9</gadget>
<output>12</output>

<result>12</result>