Demosthenes (384 BC–322 BC) complained that the need to use pebbles for calculations was too difficult.
dɛmˈoʊsthənˌiːz θɹˈiːhˈʌndɹɪd ˈeɪɾi fˈoːɹ bˌiːsˈiː θɹˈiːhˈʌndɹɪd twˈɛnti tˈuː bˌiːsˈiː kəmplˈeɪnd ðætðə nˈiːd tə jˈuːz pˈɛbəlz fɔːɹ kˌælkjʊlˈeɪʃənz wʌz tˈuː dˈɪfɪkəlt.