The wiring crew needs to erect a communication line. It is planned to erect 105 meters per day and complete in 40 days. If 120 meters are erected every day, how many days can it be completed? (solution by equation)
架线班要架设一条通讯线路，计划每天架设105米，40天完成．如果每天架设120米，多少天可以完成？(用方程解)
<gadget id="calculator">105 * 40</gadget>
<output>4_200</output>

<gadget id="calculator">4_200 / 120</gadget>
<output>35</output>

<result>35</result>