Rectangular garden

How many m² (square meters) is a rectangular garden if a = 21 steps and a wide b = 41 steps are long, with the length of one step being, on average, 3/4 (three quarters) meters?

Correct answer:

S =  484.3125 m²

Step-by-step explanation:

$$\begin{gathered} a=21 \\ b=41 \\ k=3/4=\frac{3}{4}=0.75\text{m} \\ A=k\cdot a=0.75\cdot 21=\frac{63}{4}=15.75\text{m} \\ B=k\cdot b=0.75\cdot 41=\frac{123}{4}=30.75\text{m} \\ S=A\cdot B=15.75\cdot 30.75=484.3125{\text{m}}^2 \end{gathered}$$

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