First calculate the area of the parallelogram, which can be multiplied by the height, that is:

2500m× 680m =1700,000m2

Next, the wheat harvest is converted into the harvest per square meter, and the total harvest can be divided by the area, that is:

1 190 tons1700,000 square meters = 0.0007 tons/square meter

Finally, the output per square meter can be converted into the output per hectare, multiplied by 0.0007 tons/square meter and 10000 square meter/hectare, namely:

0.0007 tons/m2×10000 m2/ha = 7 tons/ha.

Therefore, the average yield of wheat per hectare is 7 tons. I hope my answer will satisfy you!