A hand-crank pencil sharpener can sharpen one pencil every forty-five seconds. An electric version can sharpen one in twenty seconds. How many more pencils can the electric sharpener sharpen than the hand-crank sharpener in six minutes?
A minute is 60 seconds, so 6 minutes is 6 * 60 = 
<gadget id="calculator">6*60</gadget>
<output>360</output>
360 seconds.
A hand-crank sharpener can sharpen 360 / 45 = 
<gadget id="calculator">360/45</gadget>
<output>8</output>
8 pencils in 6 minutes.
An electric sharpener can sharpen 360 / 20 = 
<gadget id="calculator">360/20</gadget>
<output>18</output>
18 pencils in 6 minutes.
Therefore, an electric sharpener can sharpen 18 - 8 = 
<gadget id="calculator">18-8</gadget>
<output>10</output>
10 more pencils than a hand-crank in 6 minutes.

<result>10</result>