On a map whose scale is 1cm is equivalent to 40km, measure the length of the railway between A and B as 3.8cm, how many kilometers are the total length of A and B?
在比例尺是1cm相当于40km的地图上，量得甲、乙两地间的铁路长3.8cm，甲、乙两地全长多少km．
<gadget id="calculator">40 * 3.8</gadget>
<output>152</output>

<result>152</result>