arithmetical calculations meaning in English

算术的运算
算术运算

Many , also , who were not aware of the circumstances attending his withdrawal from paris , were struck with the worthy appearance , the gentlemanly bearing , and the knowledge of the world displayed by the old patrician , who certainly played the nobleman very well , so long as he said nothing , and made no arithmetical calculations
好些人知道他到基督山伯爵家里时穿的是绿底绣黑青蛙的外套，他们对他那种庄严的姿态和绅士风度曾留下很深刻的印象。的确，只要不张口说话，不计算数字，他扮演一个老贵族实在很出色。