rectangular water tank has a length of 80 cm, a width of 50 cm, and a height of 40 cm measured from the outside. The depth of water in the tank is 35 cm. Assuming that the thickness of the tank wall is negligible, how many liters of water are there in the tank?
一个长方形状的水箱，从外面量长是80cm，宽50cm，高40cm，水箱里的水深35cm，假设水箱壁的厚度可以忽略不计，则水箱里有多少升水？
<result>140</result>