The engineering team dug a ditch. In the first 3 days, they dug a total of 150 meters. In the next 5 days, they dug an average of 70 meters a day to complete the project. How long is this ditch?
工程队挖一条水沟，前3天共挖了150米，后5天平均每天多挖70米才能完工这条水沟长多少米？
<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<gadget id="calculator">70 + 50</gadget>
<output>120</output>

<gadget id="calculator">120 * 5</gadget>
<output>600</output>

<gadget id="calculator">150 + 600</gadget>
<output>750</output>

<result>750</result>