problem solving that involves numbers or quantities
"The accountant spent hours on a complex financial reckoning to determine exactly how much profit the company made last year."
the act of counting; reciting numbers in ascending order
"the counting continued for several hours"
The action of calculating or estimating something.
"The accountant spent hours on a careful reckoning of the company's expenses before filing the report."
present participle and gerund of reckon
"After years of ignoring his debts, he finally faced the financial reckoning by paying off every loan at once."