The students went on an autumn outing and rented 4 big boats and 6 small boats for a total of 112 yuan. The rent for each small boat was 8.5 yuan. How much is the rent for each big boat?
同学们去秋游，租了4条大船和6条小船，共用去112元，每条小船租金是8.5元，问每条大船租金多少元？
<gadget id="calculator">8.5 * 6</gadget>
<output>51</output>

<gadget id="calculator">112 - 51</gadget>
<output>61</output>

<gadget id="calculator">61 / 4</gadget>
<output>61/4 = around 15.25</output>

<result>61/4 = around 15.25</result>