From A to B, it’s 3/8, and there are still 200 meters away from the midpoint. How many meters are there between A and B?
从甲地到乙地，行了(3/8)，离中点还有200米，甲乙两地相距多少米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/2) - (3/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">200 / (1/8)</gadget>
<output>1_600</output>

<result>1_600</result>