A cotton field is 3 mu, producing 210 kilograms of lint cotton, and the other is 2 mu larger than it, producing an average of 68 kilograms of lint per mu. How many kilograms per mu are the average yield of the two fields?
一块棉花地3亩，产皮棉210千克，另一块比它多2亩，平均每亩产皮棉68千克，两块地平均每亩产多少千克？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 68</gadget>
<output>340</output>

<gadget id="calculator">210 + 340</gadget>
<output>550</output>

<gadget id="calculator">3 + 3 + 2</gadget>
<output>8</output>

<gadget id="calculator">550 / 8</gadget>
<output>275/4 = around 68.75</output>

<result>275/4 = around 68.75</result>