There is a rectangular wheat field. The length drawn on the picture is 5 cm, the width is 4 cm, and the actual length is 400 meters. If 6 tons of wheat are harvested per hectare, how many tons of wheat will be harvested in this wheat field?
有一块长方形麦田，画在图上长是5厘米，宽是4厘米，实际长是400米，如果每公顷收小麦6吨，这块麦田共收小麦多少吨？
<gadget id="calculator">12.8 * 6</gadget>
<output>76.8</output>

<result>76.8</result>