Three engineering teams A, B, and C have jointly built a road. Captain A said: We have completed half of the task. Captain B said: We have repaired 300 meters. Captain C said: We undertook 30% of the total length. How many meters is this road in total?
甲、乙、丙三个工程队共同修完了一条公路．甲队长说：我们完成了全部任务的一半．乙队长说：我们修了300米．丙队长说：我们承担了全长的30%．这条公路一共长多少米？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/2) - (3/10)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">300 / (1/5)</gadget>
<output>1_500</output>

<result>1_500</result>