It is 402.
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134*3=402
405 = 9 x 45
Any multiple of 20 that is greater than 400. If the multiple is 400 or fewer then the length of the rectangle will be less than (or equal to) its width which contradicts the definition of the length as the longer side of a rectangle.
400 is greater than 1.13
400 meter is less than 1 km