There are two cotton fields, A and B, with an average yield of 185 jin per mu. The cotton field of A has 5 mu, and the yield per mu is 203. The cotton field of B has 170 jin per mu. How many mu does the cotton field of B have?
甲乙两块棉田，平均亩产185斤，甲棉田是5亩，亩产203，乙棉田亩产170斤，乙棉田有多少亩．
<gadget id="calculator">5 * 203</gadget>
<output>1_015</output>

<gadget id="calculator">5 * 185</gadget>
<output>925</output>

<gadget id="calculator">1_015 - 925</gadget>
<output>90</output>

<gadget id="calculator">185 - 170</gadget>
<output>15</output>

<gadget id="calculator">90 / 15</gadget>
<output>6</output>

<result>6</result>