1257 •315 ———

To multiply 1257 by 315, we can perform the calculation step by step:

           1257
         ×  315
        _________
          37821   (1257 × 5)
        3771     (1257 × 1, shifted one position to the left)
+     3771      (1257 × 3, shifted two positions to the left)
___________
   396315

So, \( 1257 \times 315 = 396315 \).