A rectangular test field is 87.5 meters long and 62.4 meters wide, with an average harvest of 0.78 kilograms of wheat per square meter. How many tons of wheat are harvested in this test field?
一块长方形试验田长87.5米，宽62.4米，平均每平方米收小麦0.78千克，这块试验田共收小麦多少吨？
<gadget id="calculator">0.78 / 1_000</gadget>
<output>0.00078</output>

<gadget id="calculator">87.5 * 62.4 * 0.00078</gadget>
<output>4.2588</output>

<result>4.2588</result>