1987654321*1234567891
Try it on the calc: http://web2.0calc.com/
Ninja. Can I solve it?
$${\mathtt{1\,987\,654\,321}}{\mathtt{\,\times\,}}{\mathtt{1\,234\,567\,891}} = {\mathtt{2\,453\,894\,203\,114\,007\,011}}$$