Xiaohong went from home to the county town to go to school. She walked at a speed of 50 meters per minute for 3 minutes. She realized that she would be 8 minutes late if she kept walking at this speed, so she immediately speeded up and walked an extra 10 meters per minute. At school, there are still 5 minutes before class, how many meters is the distance from Xiaohong's house to school?
小红从家里到县城去上学，她以每分钟50米的速度走了3分钟，发觉按这个速度走下去就要迟到8分钟，于是立即加快了速度，每分钟多走了10米，结果到学校时，离上课还有5分钟，小红家到学校的路程是多少米．
<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<gadget id="calculator">3_900 + 150</gadget>
<output>4_050</output>

<result>4_050</result>