Xincun has built two rural roads this year, with a total length of 960 meters, which is three times that of last year. How many meters more roads have been built this year than last year?
新村今年修了2条乡村公路，总长960米，是去年的3倍，今年比去年多修了多少米公路？
<gadget id="calculator">960 / 3</gadget>
<output>320</output>

<gadget id="calculator">960 - 320</gadget>
<output>640</output>

<result>640</result>