Some of the best calorie counter calculators can be found online. You just have to look through different ones until you find one you like. If you dont feel confident then you can work it out using pen, paper and a calculator.
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One can find a calculator for the number of calories in a Subway sandwich on the official Subway website. Their calorie calculator is a popular tool used by many.
the chinese and it is for counting. it is the original calculator
The first modern-style electronic calculator was invented in the 1960s. The first counting device, an abacus, was invented in Egypt in about 2000 BCE. The mechanical calculator was developed in the 17th century.
Because it was the first portable counting device - sort of the first 'pocket' calculator !
The Romans did their calculations on an abacus counting device which was the equivalent to a primitive calculator.