First find the total number of pies Marcus bakes: 5 pies/batch * 7 batches = <<5*7=35>>35 pies

Then subtract the number of pies Marcus drops: 35 pies - 8 pies = <<35-8=27>>27 pies

# Answer

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<|im_start|>system
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<|im_start|>user
Marcus can fit 5 pies in his oven at once. He bakes 7 batches of pies, then slips and drops 8 of them. How many pies are left?
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user
27
Marcus can fit 5 pies in his oven at once. He bakes 7 batches of pies, then slips and drops 8 of them. How many pies are left?
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