Two typists, A and B, practice typing. A can type 49 characters per minute, and B can type 180 characters in 5 minutes. How much more can A type than B per minute?
甲、乙两个打字员练习打字，甲每分钟打49个字，乙5分钟打180个字，甲每分钟比乙多打多少个字．
<gadget id="calculator">180 / 5</gadget>
<output>36</output>

<gadget id="calculator">49 - 36</gadget>
<output>13</output>

<result>13</result>