triangular vegetable field harvests a total of 400 kg of vegetables. It is known that the harvest of vegetables per square meter is 20 kg. The bottom of this field is 10 meters. What is the height in meters? (column equation solution)
一块三角形的菜地共收蔬菜400千克，已知每平方米收蔬菜20千克，这块地的底是10米，求高是多少米？(列方程解答)
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 20</gadget>
<output>100</output>

<gadget id="calculator">400 / 100</gadget>
<output>4</output>

<result>4</result>