There is a triangular experimental field with a base of 250m and a height of 160m, with a total grain output of 4.2 tons throughout the year, how many tons of grain per hectare on average?
有一块底250m，高160m的三角形实验田，全年共产粮食4.2吨，平均每公倾产粮多少吨？
<gadget id="calculator">160 / 2 / 10_000</gadget>
<output>1/125 = around 0.008</output>

<gadget id="calculator">250 * (1/125)</gadget>
<output>2</output>

<gadget id="calculator">4.2 / 2</gadget>
<output>2.1</output>

<result>2.1</result>