A rectangular wheat field is 12 meters long and 7 meters wide. Each square meter of wheat field can produce 30 kilograms of wheat, how many kilograms can be produced in total?
一块长方形麦地，长12米，宽7米．每平方米麦地可产小麦30千克，一共可以产多少千克？
<gadget id="calculator">12 * 7 * 30</gadget>
<output>2_520</output>

<result>2_520</result>