Two people, A and B, walk toward each other from A and B at the same time. When A reaches B, B is 75 meters away from A. When B reaches A, A has already walked 90 meters from B. A, What is the distance between B and B?
甲、乙两人同时从A、B两地相向而行，当甲走到B地时，乙距A地75米，当乙走到A地时，甲已走过B地90米，A、B两地相距多少米？
<gadget id="calculator">75 / 5</gadget>
<output>15</output>

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

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/5) - (1/6)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">15 / (1/30)</gadget>
<output>450</output>

<result>450</result>