A paddling pool has a diameter of 2 metres and is 40cm high what is the volume

V=pi*r^2*h

V=pi*100*100*40  cm^3

$${\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{10\,000}}{\mathtt{\,\times\,}}{\mathtt{40}} = {\mathtt{1\,256\,637.061\: \!435\: \!917\: \!295\: \!385\: \!1}}$$

1 256 637 cm^3

= 1256 637 mL

= 1 257 L     (to the nearest L)