Simple area question! Try figure it outwith working!

164

I'm not really sure... Would you find how many cm are in 1m, and then multiply that by 41???

If there are 41 blades of grass per square centimeter how many blades of grass would you have on a bit of land that is 4 square meters?

$\begin{array}{rcll} 4\ m^2 &=& 4\ m^2 \cdot \frac{100\ cm}{1\ m}\cdot \frac{100\ cm}{1\ m}\\ &=& 40000\ cm^2\\\\ \frac{41\ \text{Blades of grass}}{ 1\ cm^2} \cdot 40000\ cm^2 &=& 41\cdot 40000 \quad \text{Blades of grass}\\ &=& 1640000 \quad \text{Blades of grass}\\ \end{array}$