Ключевые слова: 3d, 3d illustration, abacus, accounting, arithmetic, background, ball, bead, bill, black, business, calculation, closeup, colours, compute, concept, count, education, finance, financial, focus, illustration, learn, learning, mathematical, mathematics, nobody, number, obsolete, problem, red, render, retro, row, selective, sum, symbol, tax, tool, traditional, vintage, work,