Aunt Li’s clock was 4 minutes behind her watch. At 9:30 in the morning, she checked the time with the clock. When the clock reached 1:00 noon, how many minutes was the watch ahead of the clock?
李阿姨家的钟比她的手表每小时慢4分钟，早晨9点半时，她将手表和钟对了一次时间，当钟走到中午1点时，手表比钟快了几分钟？
<gadget id="calculator">60 * 3.5</gadget>
<output>210</output>

<gadget id="calculator">210 * 60</gadget>
<output>12_600</output>

<gadget id="calculator">60 - 4</gadget>
<output>56</output>

<gadget id="calculator">12_600 / 56</gadget>
<output>225</output>

<gadget id="calculator">225 - 210</gadget>
<output>15</output>

<result>15</result>