canal has been dug for 4 days, 148 meters per day, and 848 meters are left. How long is this canal in meters?
一条水渠，已挖4天，每天挖148米，还剩848米，这条水渠全长多少米？
<gadget id="calculator">148 * 4</gadget>
<output>592</output>

<gadget id="calculator">592 + 848</gadget>
<output>1_440</output>

<result>1_440</result>