There are two cotton fields, A and B, with an average yield of 185 kilograms of seed cotton per mu. A cotton field has 5 mu, with an average yield of 203 kilograms of seed cotton per mu; B cotton field has an average yield of 170 kilograms of seed cotton per mu. How many acres does B cotton field have?
甲乙两块棉田，平均亩产籽棉185公斤，甲棉田有5亩，平均亩产籽棉203公斤；乙棉田平均亩产籽棉170公斤，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>