Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to estimate roofing materials [title] Find the square footage of the roof. [step] Measure the length and width of each portion of the roof, multiply length by width for each plane, and then add the planes together for the total square footage. [title] Determine the total number of squares.

Ending1: [step] Measure from the center to the 6 where the roof meets the ground. Multiply this number by one to see the approximate total square footage of each square. Ending2: [step] Divide the total footage by 100 to determine the number of " squares " in the roof. [title] Determine the bundles of shingles needed to cover the roof. Ending3: [step] The total square footage for every square square foot of the roof should be the same by counting them all together. By finding the square footage, you can determine how the roof will stack or cap. Ending4: [step] For example, if you planned to buy a house, you can divide the square footage of the building by 243. When you divide the total number of squares divided by 243, you get the total square footage for the house.

Answer format: ending1/ending2/ending3/ending4