8504.40.9031    9403.70.0000
8504.40.9090    9403.70.8031
8504.40.9510    9403.70.9000

8504409031  9403700000
8504409090  9403708031
8504409510  9403709000

function appendString() {
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var numRows = range.getNumRows();
var numCols = range.getNumColumns();
var writeValues = []
for (var i = 1; i <= numRows; i++) {
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  for (var j = 1; j <= numCols; j++) {
    var currentValue = range.getCell(i,j).getValue();
    var withString = currentValue.toString().replace(".","");
    row.push(withString)
  }
  writeValues.push(row)
}
range.setValues(writeValues)
}

850440.9031 940370
850440.909  940370.8031
850440.951  940370.9