To build a road 5400 meters long. The ones that have been repaired are 4 times longer than the ones that have not been repaired. How many meters has this road been built?
要修一条长5400米的公路．已经修的比没有修的4倍多400米．这条路已经修了多少米？
<gadget id="calculator">5_400 * 4</gadget>
<output>21_600</output>

<gadget id="calculator">21_600 + 400</gadget>
<output>22_000</output>

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

<gadget id="calculator">22_000 / 5</gadget>
<output>4_400</output>

<result>4_400</result>