Examples field grass in Czech examples

How do I translate field grass into Czech?

Movie subtitles

It's like asking how many blades of grass are there on this soccer field.

Je to jako se ptát, kolik stébel trávy je na tomto fotbalovém hřišti.

All I have to do now is count the number of blades of grass in that little two-inch square and then multiply by the number of squares that would cover this whole field.

Všechno co musím udělat, je spočítat počet stébel trávy v tomto malém čtverci a pak násobit počtem čtverců, který by pokryl celou tuto oblast.