Method 1:
How many watermelon trees are there? 8×35=280 (one).
Calculate the number of watermelons again: 280×2=560 (pieces)
Method 2:
1. How many watermelons are planted in each ridge: 35×2=70 (each).
8 How many watermelons are ridged: 70×8=560 (each)
A * * * has 560 watermelons.
Two formulas, two meanings.