Li Qiang typed 588 characters in 14 minutes, and Wang Li typed 720 characters in 16 minutes. On average, how many characters did Li Qiang type less than Wang Li per minute?
李强14分钟打了588个字，王丽16分钟打了720个字，李强平均每分钟比王丽少打多少个字？
<gadget id="calculator">720 / 16</gadget>
<output>45</output>

<gadget id="calculator">588 / 14</gadget>
<output>42</output>

<gadget id="calculator">45 - 42</gadget>
<output>3</output>

<result>3</result>