Try: He is a very shrewd person; he does mental arithmetic faster than you would do with a calculator. You may forget how many cups of tea you had in a day, but not him, not even after a week. Pappu may be illiterate, but he is skillfull in running a business.
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cbstehTry:
He is a very shrewd person; he does mental arithmetic faster than you would do with a calculator. You may forget how many cups of tea you had in a day, but not him, not even after a week. Pappu may be illiterate, but he is skillfull in running a business. He knows the golden rule in business: customer is king. That is because satisfied customers will r