There's another, even easier way (rot13): yrnir 1 png orsber gur svefg chfure neebj, fb vg fgnlf ba gur oyhr 7-qbg syntf. Bayl fraq gjb guebhtu. Gung jnl lbh *pna* yrg n png ba gur rzcgl synt naq fgvyy fheivir. Guvf jnl, lbh bayl arrq gb ghea 1 png gb fgbar, naq lbh qba'g arrq gb chfu gur cvax synt ng nyy.
It's always cool when there are multiple solutions, though!