A trapezoidal vegetable field is 60 meters long at the top, 100 meters long at the bottom, and 25 meters high. If the income per square meter is 4.5 yuan, how much is the total income of this vegetable field?
一块梯形菜地，上底长60米，下底长100米，高是25米．如果每平方米收入4.5元，那么这块菜地一共收入多少元钱？
<gadget id="calculator">60 + 100</gadget>
<output>160</output>

<gadget id="calculator">25 / 2</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">160 * (25/2) * 4.5</gadget>
<output>9_000</output>

<result>9_000</result>