975629356237*8715473

yp we can't that quiz easy without the cal. so ur method is gd that

$${\mathtt{975\,629\,356\,237}}{\mathtt{\,\times\,}}{\mathtt{8\,715\,473}} = {\mathtt{8\,503\,071\,312\,290\,955\,101}}$$

That's a funny answer & question dr

I kinda doubt he needed to know.....and I definetly wasn't going to solve it without a calculator