Extracting distance from Google Maps DistanceMatrix API - flutter

Question

I need to calculate the distance between coordinates.
I am using the Google Maps DistanceMatrix API:
getDistanceMatrix() async {
try {
var response = await Dio().get('https://maps.googleapis.com/maps/api/distancematrix/json?destinations=${widget.miLatitud},${widget.miLongitud}&origins=${location.latitude},${location.longitude}&key=...');
print("distancia es ${response}");
} catch (e) {
print(e);
}
}
Which is the proper way to extract the distance from the response?
Here you have the response output:
distancia es {"destination_addresses":["Carrer de Sant Ramon, 62, 08140 Caldes de Montbui, Barcelona, Spain"],"origin_addresses":["Plaça de la Porxada, 32, 08401 Granollers, Barcelona, Spain"],"rows":[{"elements":[{"distance":{"text":"13.0 km","value":13012},"duration":{"text":"21 mins","value":1234},"status":"OK"}]}],"status":"OK"}

Answer 1

This is the beautified JSON file:
{
"destination_addresses":[
"Carrer de Sant Ramon, 62, 08140 Caldes de Montbui, Barcelona, Spain"
],
"origin_addresses":[
"Plaça de la Porxada, 32, 08401 Granollers, Barcelona, Spain"
],
"rows":[
{
"elements":[
{
"distance":{
"text":"13.0 km",
"value":13012
},
"duration":{
"text":"21 mins",
"value":1234
},
"status":"OK"
}
]
}
],
"status":"OK"
}
As you can see, you can get the distance if you go to rows-elements-distance-value, where you would get the result in meters.