It was time for art class, and Xiao Ming realized that he forgot to bring his painting tools. If he went home at a speed of 80 meters per minute and returned to school, he would be 3 minutes late; if he went home at a speed of 100 meters per minute, he would be 5 minutes early Excuse me, how many meters is his home from the school?
要上美术课了，小明才发现忘了带画具，如果以每分钟80米的速度回家拿再回到学校要迟到3分钟；如果用每分钟100米的速度回家拿就会提早5分钟到，请问他家离学校有多少米？
<gadget id="calculator">5 * 100</gadget>
<output>500</output>

<gadget id="calculator">3 * 80</gadget>
<output>240</output>

<gadget id="calculator">500 + 240</gadget>
<output>740</output>

<gadget id="calculator">100 - 80</gadget>
<output>20</output>

<gadget id="calculator">740 / 20</gadget>
<output>37</output>

<gadget id="calculator">80 * 37</gadget>
<output>2_960</output>

<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">2_960 + 240</gadget>
<output>3_200</output>

<result>3_200</result>