Xiaogang’s father walks 65 meters per minute to get home from the factory, and he will arrive home 6 minutes late; if he walks 75 meters per minute, he will arrive home 4 minutes early. How many meters does it take to get home from the factory?
小刚爸爸从工厂到家，如果每分走65米，则要迟到家6分钟，如果每分走75米，则要早到家4分钟，工厂到家有多少米．
<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">1 / 65</gadget>
<output>1/65 = around 0.015385</output>

<gadget id="calculator">1 / 75</gadget>
<output>1/75 = around 0.013333</output>

<gadget id="calculator">(1/65) - (1/75)</gadget>
<output>2/975 = around 0.002051</output>

<gadget id="calculator">10 / (2/975)</gadget>
<output>4_875</output>

<result>4_875</result>