The engineering team planned to build 1.5 kilometers of roads every day, but actually built 1.2 kilometers a day. After 40 days, there were still 3 kilometers left to be completed. How many kilometers is this road in total?
工程队修路，计划每天修1.5千米，实际每天修1.2千米，结果40天后还有3千米没有完成．这条路共多少千米？
<gadget id="calculator">1.2 * 40</gadget>
<output>48</output>

<gadget id="calculator">48 + 3</gadget>
<output>51</output>

<result>51</result>