A, B, C, and D work together to build roads, A repairs the other three teams to draw (1/2), B repairs the other three teams to draw (1/3), C repairs the other three teams to draw (1/4), D repairs 91 meters, how many meters is the road long?
甲、乙、丙、丁合修路，甲修另外三队和的(1/2)，乙修另外三队和的(1/3)，丙修另外三队和的(1/4)，丁修91米，路长多少米？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

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

<gadget id="calculator">1 - (1/3) - (1/4) - (1/5)</gadget>
<output>13/60 = around 0.216667</output>

<gadget id="calculator">91 / (13/60)</gadget>
<output>420</output>

<result>420</result>