You don't need to understand long division to be able to do that. Long division is over the integers. It's got a weird notation, and I never learnt it. There i

You don't need to understand long division to be able to do that. Long division is over the integers. It's got a weird notation, and I never learnt it. There isn't any reason for 99.9% of mathematicians - even in abstract algebra - to know long division.