\[\boxed{\mathbf{374.}}\]
\[403 - 6 = 397\]
\[403 - 16 = 387\]
\[403 - 216 = 187\]
\[502 - 4 = 498\]
\[502 - 34 = 468\]
\[502 - 134 = 368\]
\[611 - 5 = 606\]
\[611 - 25 = 586\]
\[611 - 425 = 186\]
\[715 - 6 = 709\]
\[715 - 56 = 659\]
\[715 - 556 = 159\]