For a trapezoidal wheat field, the sum of the upper and lower bases is 73 meters, and the height is 30 meters. If 5 kilograms of wheat are harvested per square meter, how many kilograms of wheat are harvested in this field?
一块梯形的小麦地，上底和下底的和是73米，高是30米．如果每平方米收小麦5千克，这块地共收小麦多少千克？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">73 * 15 * 5</gadget>
<output>5_475</output>

<result>5_475</result>