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Humans discovered math ,and math helped us for centuries.
If Math were never  existed, people will cheat on people on the value of our money.
For example, Pepe is trading his Cadillac for a Hyundai Grand i10, Pepe dont know what is the difference of the cars and dont know what is the price of the car so he traded it and he just lost money because math doesnt exist.
Thats what will happen if you dont calculate or use math when you are buying something or selling something.