set all initial setting states to false

src/Addition.js

@@ -18,7 +18,7 @@ function Addition() {
   const [resultsGrid, setResultsGrid] = useState([{id: 1, number: ""}]); // calculated result
   const [stepsGrid, setStepsGrid] = useState([{id: 1, step: ""}]); // one step for every digit
   const [autoMoveComma, setAutoMoveComma] = useState(false); // move the comma automatically
-  const [allowStartOver, setAllowStartOver] = useState(true); // show steps and allow restart
+  const [allowStartOver, setAllowStartOver] = useState(false); // show steps and allow restart
 
   let calculationInput = useRef(null);
   useEffect(()=>{

src/Subtraction.js

@@ -18,7 +18,7 @@ function Subtraction() {
   const [resultsGrid, setResultsGrid] = useState([{id: 1, number: ""}]); // calculated result
   const [stepsGrid, setStepsGrid] = useState([{id: 1, step: ""}]); // one step for every digit
   const [autoMoveComma, setAutoMoveComma] = useState(false); // move the comma automatically
-  const [allowStartOver, setAllowStartOver] = useState(true); // show steps and allow restart
+  const [allowStartOver, setAllowStartOver] = useState(false); // show steps and allow restart
 
   let calculationInput = useRef(null);
   useEffect(()=>{