Apply fertilizer to a trapezoidal field. The upper base of this field is 80 meters long, the lower base is 125 meters long, and the height is 60 meters. If 0.8 kg of fertilizer is applied per square meter, how many kg of fertilizer should be applied to this land?
给一块梯形的田地施肥，这块田地的上底长80米，下底长125米，高是60米．如果每平方米施肥0.8千克，那么这块地共需施肥多少千克？
<gadget id="calculator">80 + 125</gadget>
<output>205</output>

<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">205 * 30 * 0.8</gadget>
<output>4_920</output>

<result>4_920</result>