rectangular vegetable field has a circumference of 2400 meters and a width of 500 meters. It is planned to plow 6 hectares per day. How many days will it take to plow?
一块长方形菜地，周长是2400米，宽是500米，计划每天耕地6公顷，需要几天耕完？
<gadget id="calculator">2_400 / 2</gadget>
<output>1_200</output>

<gadget id="calculator">1_200 - 500</gadget>
<output>700</output>

<gadget id="calculator">700 / 10_000 / 6</gadget>
<output>7/600 = around 0.011667</output>

<gadget id="calculator">500 * (7/600)</gadget>
<output>35/6 = around 5.833333</output>

<result>35/6 = around 5.833333</result>