=STXT(A1&"0";MIN(1;NBCAR(A1&"0"));1)+STXT(A1&"0";MIN(2;NBCAR(A1&"0"));1)+STXT(A1&"0";MIN(3;NBCAR(A1&"0"));1)+STXT(A1&"0";MIN(4;NBCAR(A1&"0"));1)+STXT(A1&"0";MIN(5;NBCAR(A1&"0"));1)+STXT(A1&"0";MIN(6;NBCAR(A1&"0"));1)+STXT(A1&"0";MIN(7;NBCAR(A1&"0"));1)+STXT(A1&"0";MIN(8;NBCAR(A1&"0"));1)