Let me see: four times five is twelve, and four times six is thirteen, and four times seven is--oh dear!

让我想一想四乘五是十二，四乘六是十三，四乘七……

youdao

Let me see: four times five is twelve, and four times six is thirteen, and four times seven is--oh dear!

让我想一想四乘五是十二，四乘六是十三，四乘七……

youdao