Four brothers repaired a road together, but the elder brother repaired half of the total of the other three, the second repaired (1/3) of the total of the other three, the third repaired the other (1/4) of the total, and the fourth repaired 91 kilometers , how many meters is this road?
兄弟四人合修一条路，结果老大修了另外三人总数的一半，老二修了另外三人总数的(1/3)，老三修了另外总数的(1/4)，老四修了91千米，这条路有多少米？
<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>