A trapezoidal steel plate has an upper base of 50 cm, a lower base of 75 cm, and a height of 20 cm. If a steel plate weighs 8 grams per square centimeter, how many kilograms does the steel plate weigh?
一块梯形钢板，上底是50厘米，下底是75厘米，高是20厘米．如果每平方厘米的钢板重8克，这块钢板重多少千克？
<gadget id="calculator">50 + 75</gadget>
<output>125</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">8 / 1_000</gadget>
<output>1/125 = around 0.008</output>

<gadget id="calculator">125 * 10 * (1/125)</gadget>
<output>10</output>

<result>10</result>