From school to home, it takes 16 minutes for the younger sister to walk, and 5 minutes for the elder brother to ride a bicycle. At this speed, the two brothers and sisters walk towards each other from home and school at the same time. When we met, my sister walked 250 meters and asked how long it was from school to home?
从学校到家，妹妹步行需16分，哥哥骑自行车需5分，按这样的速度，兄妹二人同时从家和学校相向而行．相遇时妹妹行了250米，问学校到家有多长？
<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/16) + (1/5)</gadget>
<output>21/80 = around 0.2625</output>

<gadget id="calculator">1 / (21/80)</gadget>
<output>80/21 = around 3.809524</output>

<gadget id="calculator">(80/21) * (1/16)</gadget>
<output>5/21 = around 0.238095</output>

<gadget id="calculator">250 / (5/21)</gadget>
<output>1_050</output>

<result>1_050</result>